I've heard that not a lot of people are pleased with the limited amount of zombies in Left 4 Dead. I mean, 4 special infected? 1 common enemy (true, no 2 common zombies are alike, but come on. They all share the same goal and moveset.)? If you have a good idea for a zombie, lay it on me. My idea is The Screamer. One of the special infected that is very rare, and rightly so. For it can attract the horde.

Quality #1: Bipedal.

Quality #2: Bound in a straight-jacket.

Quality #3: Can run twice as fast as the witch (which is pretty fast if you think about it).

Quality #4: Can be detected by loud, manniacal laughter.

Quality #5: Cannot climb any surface. Sucking already?

Quality #6: Can be killed in 1 shot. Really sucks now. I can tell.

Attacks.

1: Only one. After you've been spotted (or when you spot the survivors) pressing the attack button will cause you to lose controll temporarily and the screamer will run to a safe distance closer to, or away from the survivors (depending on where you are). Then the screen will turn a bloody red and the screamer will howl into the night, thus attracting the horde.

I think there is already a forum like this try looking for it?

Edit: Meh, I found it. It is here.

Well what if the people want this one so nobody is blamed for copying?

as reguards to screamer...a VERY large horde say 300-500 infected.

Yeah, this is basically the same thing as the Create-A-Zombie thread. Feel free to visit the link that Ham Seller provided to continue posting any more zombies ideas you have. =D